Ford Electric Ranger 1998 Student Manual page 140

LESSON 4: SPECIAL SERVICE TOOLS AND PROCEDURES
4-8
Electric Motor/Transaxle Test Box
Electric Motor/Transaxle Test Box
•
The Electric Motor/Transaxle Test Box is used to perform tests that
are necessary for diagnosing internal electric motor/transaxle
components.
•
The Electric Motor/Transaxle Test Box will perform the following
component tests on the electric motor/transaxle.
NOTE: If a problem with one of these internal components is
identified and confirmed, the entire electric motor/transaxle will
require replacement.
•
Motor Speed Sensor Operation – The Electric Motor/Transaxle
Test Box will confirm the operation of the speed sensors within the
motor assembly. Working through the transaxle connector located
on the top of the motor assembly next to the three power leads, the
tester directly interfaces with the speed sensors. Spinning the
wheels by hand will cause lights to alternately illuminate on the
tester. If there is a problem with the sensors, either one or both
lights will not illuminate.
•
Motor Temperature Sensor – The Electric Motor/Transaxle Test
Box provides an interface for a digital voltmeter to directly read the
resistance of the temperature sensor. This resistance will
correspond with a temperature in degrees Celsius. A resistance
value that falls outside of the range specified may indicate that the
sensor has either shorted or is an open circuit.
1U14 TRANSAXLE TEST BOX
Lube Pump
C
P h
a
O
n
W n
E e
l
R On Pressure
RPM Sensor
P
Hi Hi
O
W
E Channel A Channel B
R
Low Low
Sensor Temp
1998 Ranger EV New Model Training
ER150A-A